Marine Forecast
Issued 03:00 AM EST 20 December 2025
Today Tonight and Sunday.
Gale warning in effect.
Wind south 35 knots diminishing to south 30 early this morning
then veering to southwest 25 near noon. Wind increasing to west 40 this
afternoon then veering to northwest 35 this evening. Wind diminishing to
northwest 25 overnight and to north 15 Sunday morning. Wind diminishing to
variable 10 near noon Sunday then increasing to southwest 20 Sunday
evening.
Snow changing to scattered flurries this afternoon.
Visibility 1 mile or less in precipitation.
Freezing spray warning in effect.
Freezing spray beginning this evening and ending near noon
Sunday.
Strong wind warning program has ended for the season.
Winds
Issued 03:00 AM EST 20 December 2025
Today Tonight and Sunday.
Gale warning in effect.
Wind south 35 knots diminishing to south 30 early this morning
then veering to southwest 25 near noon. Wind increasing to west 40 this
afternoon then veering to northwest 35 this evening. Wind diminishing to
northwest 25 overnight and to north 15 Sunday morning. Wind diminishing to
variable 10 near noon Sunday then increasing to southwest 20 Sunday
evening.
Strong wind warning program has ended for the season.
Waves
Issued 03:00 AM EST 20 December 2025
Today Tonight and Sunday.
Waves 2 to 3 metres building to 3 to 4 early this evening then
subsiding to 2 Sunday morning. Waves subsiding to 0.5 to 1 near noon
Sunday.
Weather & Visibility
Issued 03:00 AM EST 20 December 2025
Today Tonight and Sunday.
Snow changing to scattered flurries this afternoon.
Visibility 1 mile or less in precipitation.
Freezing Spray
Issued 03:00 AM EST 20 December 2025
Today Tonight and Sunday.
Freezing spray warning in effect.
Freezing spray beginning this evening and ending near noon
Sunday.
Ice Forecasts
Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings (In effect)
Eastern Lake Superior
Issued 03:00 AM EST 20 December 2025'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.
Eastern Lake Superior
Issued 03:00 AM EST 20 December 2025Moderate or severe freezing spray is occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.
Technical Marine Synopsis
Issued 3:00 AM EST 20 December 2025 Today Tonight and Sunday At 3:00 a.m. EST today ridge located on a line north-south over
northeastern Ontario.
By 3:00 a.m. EST Sunday departing ridge located on a line
northwest-southeast over the Gulf of St. Lawrence.
At 3:00 a.m. EST today low 996 mb located north of Lake of the
Woods.
By 3:00 a.m. EST Sunday low 999 mb located over western Quebec.
By 3:00 a.m. EST Sunday ridge located on a line north-south over
Minnesota.